Electromagnetic block system of control.



No. 765,212. PATENTED JULY 19, 1904. G. THOMPSON.

ELECTROMAGNETIC BLOCK SYSTEM OF CONTROL.

APPLICATION-FILED MAR. 17, 1902. N0 MODEL.

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' V Vi fln/ 8805 ln v-lnor Gwi/an/jywn 5012/ K s Aft 017001 UNITED STATES Patented July 19, 190 1.

PATENT OFFICE.

GUION THOMPSON, OF DULUTH, MINNESOTA, ASSIGNOR TO THE THOMP- SON SAFETY APPLIANCE COMPANY, A CORPORATION OF NEW JERSEY.

ELECTROMAGNETIC BLOCK SYSTEM OF CONTROL.

SPECIFICATION forming part of Letters Patent No. 765,212, dated J ly 19, 1904. Application filed March 17, 1902. Serial No. 98,592 N mode To all whom, it may concern.-

Be it known that I, GUIoN THOMPSON, acitizen of the United States, residing at the city of Duluth, in the county of St. Louis and State of Minnesota,have invented new and useful Improvements in Electromagnetic Block Systems of Control, of which the following is a specification.

My invention relates to electromagnetic block systems of control, and has for its object the provision of means for progressively establishing and dissolving spheres of magnetic energy at a predetermined distance from each other upon the route of aconveyance. I attain these objects by the means shown in the accompanying drawings, in which Figure 1 is a diagram showing electromagnets, their armatures, and movable contacts attached to such armatures, other armatures attached to movable contacts, switches, a battery, and their connections, comprising the portion of my invention which is anchored upon the route of a conveyance. Fig. 2 is a diagram showing duplicate oppositely-directed movable conveyance carrying similar equipments, comprising, first, an electromagnet, a battery, a switch, and their connections, and, second, for the purpose of illustrating one of the utilities of said invention, an armature.

E, Fig. 1, represents a battery, as shown, or other source of electricity.

A and B, Fig. 1, are electromagnets, and F and G are the armatures of electromagnets A and B, respectively, and 6 and 9 are normally open circuitcontrolling contacts, as shown, or switches operated by armatures F and Ur.

O and D, Fig. 1, are armatures diagonally opposite to each other and respectively attached to normally closed circuit-controlling contacts 2 and 11.

1, 3, 4, 5, 7, 8, 10, and 12, Fig. 1, represent conductors of electricity from battery E to electromagnets A and B.

K and L, Fig. 1, are switches for the purpose of opening the circuit from battery E.

H, Fig. 2, represents a magnet of constant or alternating polarity, shown in the drawing as an electromagnet, on a movable conveyance, so placed that its pole shall pass over or 5 near the pole of electromagnet A and armature D, Fig. 1, when the conveyance is in motion in the direction A to D and over or near the pole of electromagnet B and armature C when the conveyance is in motion in the di rection B to O.

I, Fig. 2, represents a battery, as shown, or other source of electricity carried by said conveyance.

13 and 14-, Fig. 2, represent conductors of 6 electricity from battery I to electromagnet H.

S, Fig. 2, is a switch for the purpose of opening the circuit from battery I.

The operation of the device is as follows: When a pole of'magnetH on the movable con- 5 veyance (represented by Fig. 2) traveling in the direction Ato D, Fig. 1, passes or is sufficiently near a pole of electromagnet A, the magnetism of magnet H, Fig. 2, is taken up or conducted by the core of electromagnet A, 7 Fig. 1, which attracts armature F, making contact of 5 and 6, whereby an electric circuit is established from source E, through conductor 1, switch K, movable contact 2, conductor 3, coil of electromagnet A, conductor 5, movable contact 6, conductors 7 and 8, coil of electromagnet B, conductor 10,movable contact 11, conductor 12, and switch L, to source E, thereby maintaining magnetism in electromagnet A, which continues contact at '6 and maintains circuit last described, and thereby also causing electromagnet B to attract its armature Gr, making contact of 8 and 9, whereby conductor 1 is connected in the circuit last described in multiple with con- 5 ductor 7. Now when a pole of magnet H, Fig. 2, passes or is sufiiciently near the armature D, Fig. 1, said armatureD is attracted by said magnet H, Fig. 2, breaking contact between conductor 10 and movable contact 11, 9 Fig. 1, which opens the hereinbefore described circuit from source E through electromagnets A and B, thereby causing 'electromagnets A and B to lose their magnetism, which releases armatures F and G and allows them to return to their normally open position. The movable contact 11 returns to its normally closed position so soon as the magnetic action of magnet H, Fig. 2, ceases to operate on armature D, Fig. 1. In similar manner when a pole of magnetH on themovable conveyance( 'epresented by Fig. 2) traveling in the direction B to C, Fig. 1, passes or is sufficiently near a pole of electromagnet B the magnetism of magnet H, Fig. 2, is taken up or conducted by the core of electromagnet B, Fig. l, which attracts armature G, making contact of 8 and 9, whereby an electric circuit is established from source E, through conductor 1, switch K, movable contact 2, conductor 3, coil of electromagnet A, conductor 5, conductor 4, movable contact 9, conductor 8, coil of electromagnet B, conductor 10, movable contact 11, conductor 12, and switch L, to source E, thereby maintaining magnetism in electromagnet B, Whichcontinues contact at 9 and maintains circuit last described, and thereby also causing electromagnet A to attract its armature F, making contact of 6 and 5, whereby conductor 7 is connected in the circuit last described in multiple with conductor 4. Now when a pole of magnet H, Fig. 2, passes or is sufficiently near the armature C, Fig. 1, said armature C is attracted by said magnet H, Fig. 2, breaking contact between conductor 3 and movable contact 2, Fig. 1, which opens the last hereinbefore-described circuit from source E through electromagnets B and A, thereby causing electromagnets B and A to lose their magnetism, which releases armatures G and F and allows them to return to their normally open position. The movable contact2 returns to its normally closed position so soon as the magnetic action of magnet H, Fig. 2, ceases to operate on armature C, Fig. 1.

The purposes and utilities of my said invention are manifold; but one illustration will be sufficient, for the purpose of which illustration it may be assumed that my said invention is incorporated in a railway-train signal system and that said conveyances are locomotives, each carrying an armature J, to which is connected a Whistle-cord or other signaling apparatus carried by said locomotive and adapted to be operated through the medium of said armature and that said armature is so positioned on said locomotive as to be carried near either one of said electromagnets A or B, according to the direction of movement of said locomotive. Now if the electromagnets A and B, Fig. 1, be energized by source E, as hereinbefore shown, when the armature J on a movable conveyance (represented by Fig. 2) traveling in the direction A to D, Fig. 1, passes or is suificiently near electromagnet A, Fig. 1, said armature J, Fig. 2, will be attracted and by its movement will operate such assumed signaling apparatus connected therewith, and when the armature J on a movable,

conveyance (represented by Fig. 2) traveling in the direction B to C, Fig. 1, passes or is sufiiciently near electromagnet B, Fig. 1, said armature J, Fig. 2, will be attracted and by its movement will operate such assumed signaling apparatus connected therewith.

' What 1 claim as my invention, and desire to secure by Letters Patent, is

1. A normally open electric circuit includ ing a source of electricity, a normally closed circuit controlling contact, the coil of an electromagnet, a normally open circuit-con trolling contact adapted to be closed by said electromagnet when said magnet is energized, the coil of a second electromagnet electrically connected in multiple with the coil of the first said electromagnet through said normally open contact and through a second normally open circuitcontrolling contact included in said circuit and adapted to be closed by said second electromagnet when said second electromagnet is energized, and a second normally closed circuit-controlling contact, substantially as described.

2. A combination comprising a normally open electric circuit, including a source of electricity, a normally closed circuit-controlling contact, the coil of an electromagnet a normally open circuit-controlling contact, the coil of a second electromagnet, electrically connected in multiple with the coil of the first said electromagnet through said normally open contact and through a second normally open circuit-controlling contact, and a second normally closed circuit-controlling contact, a local governing-lever, adapted to open the first said normally closed contact, a second local governing-lever adapted to close the first said normally open contact and to be governed by the first said electromagnet when said electromagnet is energized, a third local governing-lever adapted to close the second said normally open contact and to be governed by the said second electromagnet, when said second electromagnet is energized, and a fourth local governing-lever adapted to open the second said normally closed contact.

3. A combination comprising a normally open electric circuit,including a source of electricity, a normally closed circuit-controlling contact, an armature adapted to open said contact, the coil of an electromagnet a normally open circuit-controlling contact, an armature controlled by said magnet to close said contact, a second normally open circuitcontrolling contact, the coil of a second electromagnet, electrically connected in multiple through said open contacts with the coil of the first said electromagnet, an armature controlled by said second magnet, to close said second normally open contact, a second normally closed contact, an armature adapted to open said second normally closed contact; a traveling source of magnetic energy, adapted when moving in one direction to first magnetically energize the first said electromagnet and, continuing, to pass out of influential distance of the first said electromagnet and subsequently to operate the armature adapted to open said second normally closed contact, and When moving in the opposite direction, in a difierent'course, to first magnetically energize the second said electromagnet and, continuing, to pass out of influential distance of said second magnet and subsequently to operate the armature adapted to open the first said normally-closed contact.

4. A combination comprising, first, a normally open electric circuit, including a source of electricity, a normally closed circuit-controlling contact, the coil of an electromagnet, a normally open circuit-controlling contact, the coil of a second electromagnet, electrically connected in multiple With the coil of said first electromagnet through said normally open contact and through a second normally open contact and a second normally closed circuit-controlling contact, and, second, local means embodying an armature and controlling the position of one of the members of the first said normally closed contact, and adapted to open said 'contact, local means embodying an armature and controlling the position of one of the members of the first said normally open contact and adapted to close said contact and to be governed by the first said electromagnet When said magnet is energized,local means embodying an armature and controlling the position of one of the members of the second said normally open contact, and adapted to close the said second normally open contact and to be governed by said second electromagnet when said second magnet is energized, local means, embodying an armature and controlling the position of one of the members of the second said normally closed contact and adapted to open said second normally closed contact, a traveling source of magnetic energy adapted when moving in one direction to first magnetically energize the first said electromagnet and, continuing, to subsequently operate the local means for opening the second said normally closed contact, and when moving in the opposite direction in a parallel course, to first magnetically energize the second said electromagnet, and, continuing, to subsequently operate the local means for opening the first said normally closed circuit.

In Witness whereof I have signed my name to this specification in the presence of twosubscribing Witnesses.

GUION THOMPSON.

Witnesses:

HENRY TAYLOR, ISABELLA M. TAYLOR. 

